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<title>背景属性定义列表项目符号</title>
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li{
	list-style:none;                                               /*清除列表的默认样式*/
	height:26px;
	line-height:26px;
	background:url(images/book.png) no-repeat left center;  /*为li设置背景图像 */
	padding-left:25px;
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<body>
<h2>传智播客学科</h2>
<ul>
    <li>网页平面</li>
    <li>JAVA</li>
    <li>php</li>
    <li>.net</li>
</ul>
</body>
</html>
